Insulating panel



Nov. 19, 1935. A. o. HURXTHAL INSULATING PANEL Filed Dec. 20, 1.952

Patented Nov. 19, 1935 UNITED STATES PATENT OFFICE INSULATING PANEL Application December 20, 1932, Serial No. 648,134

10 Claims.

This invention relates to insulating panels of the general type disclosed in U. S. Letters Patent No. 1,652,055, issued to Walter M. Schwartz under date of December 6, 1927.

The principal object of the present invention is to construct a panel in a manner to minimize the conductivity of heat from one of the metal faces of the panel to another substantially parallel metal face thereof, by reducing the total extent of the direct metal contacts and connections between the two faces of the panel as much as possible without sacrificing stability and rigid.- ity of the panel unit.

The construction of a panel made in accordance with the principles of the present invention will be more fully disclosed hereinafter, reference being had to the accompanying drawing, of which:

Fig. l is a, face view of one side of the panel;

Fig. 2 is an edge view of the panel shown in Fig. 1; and

Fig. 3 is a fragmentary transverse sectional view taken on the line 3--3, Fig. l, drawn to an enlarged scale.

The panel comprises a pan section I and a cover section 2. The pan section I is composed of a sheet or plate of metal 3, forming one face of the panel. The marginal edges of the sheet 3 are bent substantially at right angles to the plane of the main central or body portion of the sheet to form a flange 4 which constitutes the marginal edge wall of the panel.

The immediate outer edge of the flange 4 is bent at right angles to the flange 4 and constitutes a supplementary marginal flange 5 which is disposed in a plane substantially parallel to the plane of the main central body portion of the sheet 3.

The supplementary flange 5 is cut away at spaced intervals, as illustrated at B in Fig. 1, to provide a plurality of ears or lugs l disposed in laterally spaced relation to each other, completely around the marginal edge of the pan section I of the panel.

From each of the ears 1 extends a diminutive protuberance 8 which is pressed from the ear I, or otherwise formed thereon, to extend beyond the plane of the flange 5 in a direction away from the facing sheet 3 of the panel.

The cover section 2 of the panel comprises a main body sheet or plate 9 having a marginal flange 58 extending completely around the panel, substantially at right angles to the plane of the sheet 9 and substantially parallel to, and spaced from, the edge wall 4 of the pan section I of the panel.

The facing sheet 9 of the cover section 2 rests directly on the protuberances 8, whereby the fac-- ing sheet 9 of the cover section 2 is spaced a predetermined distance away from the flange 5 of the pan section l and from the parallel edge of the edge wall 4, as clearly illustrated at H 5 in Fig, 3 of the drawing.

The only direct metal contacts between the pan section I and the cover section 2 of the panel are those afforded by the diminutive areas of the projecting faces of the plurality of relatively 1Q spaced protuberances 8 which engage or contact with corresponding diminutive areas of the facing sheet 9.

The space within the panel as defined by the opposite face walls 3 and 9 and the marginal edge 15 wall 4 thereof is filled with any suitable insulating material, such as mineral wool or corrugated asbestos sheets illustrated at l2 in Fig. 3.

In the present instance the pan section I and cover section 2 are permanently secured together, 20 to provide a rigid panel unit, by spot weldings 25, 25 respectively confined solely to and within the diminutive areas of contact between the outer faces of the protuberances 8 and the corresponding areas of the sheet 9 lying in direct contact 25 therewith.

For purposes of assembling a number of the panel units to form a continuous wall, such as the side walls or the roof of a drier, a suitable heat-insulating gasket element 24 is provided in the marginal groove 23 formed between the marginal edge wall or flange 4 of the pan section I and the parallel flange ll] of the cover section 2 of the panel.

I claim:

1. An insulating panel comprising two relatively spaced metal plates forming opposite faces of the panel respectively, a plurality of relatively spaced diminutive protuberances formed on one of said plates adjacent the marginal edges thereof and extending from said plate to the other of said plates to effect said spacing of and constituting the sole direct metallic heat-conducting agencies between said plates, and metallic means securing the plates together solely within diminutive contact areas afforded by said protuberances respectively.

2. An insulating panel comprising two relatively spaced metal plates forming opposite faces of the panel respectively, and a plurality of relatively spaced diminutive protuberances formed on one of said plates adjacent the marginal edges thereof and extending from said plate to the other of said plates to effect said spacing of and constituting the sole direct metallic heat-conducting agencies between said plates, said plates being secured together solely by spot weldings respectively confined to diminutive contact areas afforded by said protuberances.

3. An insulating panel comprising two relatively spaced metal plates forming opposite face walls of said panel respectively, an edge wall intermediate said face walls, a plurality of relatively spaced diminutive protuberances formed on one of said walls and extending therefrom to another of said walls to space said walls apart and constituting sole metallic contacts therebetween, and metallic means securing said protuberances to the wall contacted thereby solely within diminutive contact areas afiorded by said diminutive protuberances respectively.

4. An insulating panel comprising two relatively spaced metal plates forming opposite face walls of said panel respectively, an edge wall inter mediate said face walls, and a plurality of relatively spaced diminutive protuberances formed on one of said walls and extending therefrom to another of said walls to space said walls apart and constituting sole metallic contacts therebetween, said protuberances being permanently secured to the wall contacted thereby by spot weldings confined solely to diminutive contact areas afforded by said diminutive protuberances respectively.

5. An insulating panel comprising two relatively spaced metallic plates forming opposite faces of the panel respectively, marginal flange portions formed on at least one of said plates and disposed in relatively spaced relation to marginal portions of the other of said plates, a plurality of relatively spaced diminutive protuberances formed on and projecting from one to the other of said marginal portions for spacing said portions apart and constituting sole metallic contacts between said plates, and metallic means securing said marginal portions together solely within said diminutive contact areas afforded by said diminutive protuberances respectively.

6. An insulating panel comprising two relatively spaced metallic plates forming opposite faces of the panel respectively, marginal flange portions formed on at least one of said plates and disposed in relatively spaced relation to marginal portions of the other of said plates, and a plurality of relatively spaced diminutive protuberances formed on and projecting from one to the other of said marginal portions for spacing said portions apart and constituting sole metallic contacts between said plates, said marginal portions being permanently secured together by spot weldings confined solely to the diminutive areas respectively afforded by said diminutive protuberances.

'7. An insulating panel comprising a pan section and a cover section each comprising a body plate forming one of two opposite faces of the panel, an edge wall bent from the body plate of the pan section toward the body plate of the cover section, a flange extending from said edge wall in a plane substantially parallel to and spaced from the body plate of said cover section, a plurality of relatively spaced diminutive protuberances pressed from the flange of said pan section and engaged by the body plate of said cover section to maintain said sections in spaced relation to each other and constituting sole metallic contacts between said sections, and metallic means securing said sections together solely within the diminutive contact areas afforded by said diminutive protuberances respectively.

8. An insulating panel comprising a pan section and a cover section each comprising a body plate forming one of two opposite faces of the panel, an edge wall bent from the body plate of the pan section toward the body plate of the cover section, a flange extending from said edge wall in a plane substantially parallel to and spaced from the body plate of said cover section, and a plurality of relatively spaced diminutive protuberances pressed from the flange of said pan section and spot welded to said cover section securing said sections together in spaced relation to each other and constituting sole metallic connections between said sections.

9. An insulating panel comprising a pan section and a cover section each comprising a body plate forming one of two opposite faces of the panel, an edge wall bent from the body plate of the pan section toward the body plate of the cover section, a flange extending from said edge wall in a plane substantially parallel to and spaced from the body plate of said cover section, a plurality of relatively spaced ears projecting from said flange, and a diminutive protuberance pressed from each ear and spot welded to said cover section securing said sections together in spaced relation to each other and constituting the sole metallic connections between said sections.

10. An insulating panel comprising two relatively spaced plates forming opposite faces of the panel respectively, an edge wall bent from one of said plates toward the second of said plates, a plurality of relatively spaced ears extending from said edge wall in a plane substantially parallel to and spaced from the said second plate, diminutive protuberances pressed from said ears respectively and spot welded to said second plate securing said plates together in spaced relation to each other and constituting sole metallic connections between said plates.

ALPHEUS O. HURXTHAL. 

